Battery Energy Storage System for North Toyotomi Electric Power Substation
- Client
- North Hokkaido Wind Energy Transmission Corporation
- Location
- Toyotomi-cho, Teshio-gun, Hokkaido
- Scope of Work
- Engineering, Procurement and Construction (EPC) and 20-year maintenance contract of the battery energy storage system for North Toyotomi Power substation Energy Storage System
- Year of completion
- 2023
World's Largest Battery Energy Storage System
Battery Energy Storage Systems - Key to the Proliferation of Renewable Energy
The Japanese government is maximizing the adoption of renewable energy towards achieving its goal of carbon neutrality by 2025. Battery energy storage enables grid stabilization by resolving the challenges of fluctuating renewable energy (eg: solar and wind power) due to weather conditions, and is key to the proliferation of renewable energy.
Battery Storage Room
Contributing to the Expansion of Wind Power Generation in Hokkaido
Although ideal for wind power generation with favorable conditions, the northern region of Hokkaido faced challenges due to an insufficient local power transmission network that impeded the effective utilization of wind resources. This battery energy storage system is part of the ‘Demonstration Project for Grid Development for Wind Power Generation’ promoted by North Hokkaido Wind Energy Transmission Co., Ltd, and is crucial in mitigating fluctuating output caused by changes in wind conditions and ensuring the stability of the power system. As of January 2024, wind power plants with an output of approximately 327 MW have commenced commercial operations in Hokkaido, with further planned for a total output of 543 MW, doubling the wind power capacity. This project significantly contributes to the expansion of wind power generation in the northern region of Hokkaido.
Early Completion Achieved, Maintenance Work Underway
As the main contractor, Chiyoda constructed the large-scale energy battery system (maximum output of approximately 240MW and a total storage capacity of 720 MWh) comprising batteries, control systems, power receiving and transforming facilities and storage buildings, which is integrated with the North Toyotomi Substation. Commencing from early planning, Chiyoda developed a strong working relationship with the customer by proposing innovative solutions to overcome challenges and, after commencing construction in the harsh environment of the northernmost region of Hokkaido in July 2028, we worked as ‘One Team’ with all stakeholders to complete the five (5) year project with no accidents or incidents, successfully achieving completion and handover half a month ahead of the initial schedule in March 2023. The battery energy storage system has been operational since April 2023. Chiyoda is further supporting the customer by executing a twenty (20) year maintenance work order.
North Toyotomi Substation Battery Energy Storage System - Interior
Expanding into the Social Implementation of Energy Management Systems
Through this project, Chiyoda has established a track record of proposing the most ideal energy supply mix and aims to expand this horizontally, promoting energy battery storage system projects and working towards the social implementation of a total energy management systems, including renewable energy.